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#     http://www.apache.org/licenses/LICENSE-2.0
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*** Settings ***
| Resource | resources/libraries/robot/shared/default.robot
| Resource | resources/libraries/robot/shared/testing_path.robot
| Resource | resources/libraries/robot/ip/ip4.robot
| Resource | resources/libraries/robot/overlay/gre.robot
| Resource | resources/libraries/robot/shared/traffic.robot
| Library  | resources.libraries.python.IPUtil
| Library  | resources.libraries.python.Trace
| Force Tags | VM_ENV | HW_ENV | 3_NODE_DOUBLE_LINK_TOPO | SKIP_VPP_PATCH
| Test Setup | Set up functional test
| Test Teardown | Tear down functional test
| Documentation | *GREoIPv4 test cases*
| ...
| ... | *[Top] Network Topologies:* TG=DUT1 2-node topology with two links
| ... | between nodes; TG-DUT1-DUT2-TG 3-node circular topology with single
| ... | links between nodes.
| ... | *[Enc] Packet Encapsulations:* Eth-IPv4-GRE-IPv4-ICMPv4 on DUT1-DUT2,
| ... | Eth-IPv4-ICMPv4 on TG-DUTn for routing over GRE tunnel; Eth-IPv4-ICMPv4
| ... | on TG_if1-DUT, Eth-IPv4-GRE-IPv4-ICMPv4 on TG_if2_DUT for GREoIPv4
| ... | encapsulation and decapsulation verification.
| ... | *[Cfg] DUT configuration:* DUT1 and DUT2 are configured with IPv4 routing
| ... | and static routes. GREoIPv4 tunnel is configured between DUT1 and DUT2.
| ... | *[Ver] TG verification:* Test ICMPv4 (or ICMPv6) Echo Request packets are
| ... | sent in both directions by TG on links to DUT1 and DUT2; GREoIPv4
| ... | encapsulation and decapsulation are verified separately by TG; on
| ... | receive TG verifies packets for correctness and their IPv4 (IPv6)
| ... | src-addr, dst-addr and MAC addresses.
| ... | *[Ref] Applicable standard specifications:* RFC2784.

*** Variables ***
| ${net1_address}= | 192.168.0.0
| ${net1_host_address}= | 192.168.0.100
| ${net1_gw_address}= | 192.168.0.1
| ${net2_address}= | 192.168.2.0
| ${net2_host_address}= | 192.168.2.100
| ${net3_address}= | 192.168.3.0
| ${net3_host_address}= | 192.168.3.100
| ${net2_gw_address}= | 192.168.2.1
| ${dut1_ip_address}= | 192.168.1.1
| ${dut2_ip_address}= | 192.168.1.2
| ${dut1_gre_ip}= | 172.16.0.1
| ${dut2_gre_ip}= | 172.16.0.2
| ${dut_tun0_ip1}= | 172.16.0.1
| ${dut_tun0_ip2}= | 172.16.0.2
| ${dut_tun1_ip1}= | 172.16.1.1
| ${dut_tun1_ip2}= | 172.16.1.2
| ${dut1_lo_address}= | 10.0.0.1
| ${tun0_dst}= | 10.0.0.2
| ${tun1_dst}= | 10.0.0.3
| ${prefix}= | 24

*** Test Cases ***
| TC01: DUT1 and DUT2 route over GREoIPv4 tunnel between two TG links
| | [Documentation]
| | ... | [Top] TG-DUT1-DUT2-TG. [Enc] Eth-IPv4-GRE-IPv4-ICMPv4 on \
| | ... | DUT1-DUT2, Eth-IPv4-ICMPv4 on TG-DUTn. [Cfg] On DUT1 and DUT2
| | ... | configure GREoIPv4 tunnel with IPv4 routes towards each other.
| | ... | [Ver] Make TG send ICMPv4 Echo Req between its interfaces across
| | ... | both DUTs and GRE tunnel between them; verify IPv4 headers on
| | ... | received packets are correct. [Ref] RFC2784.
| | [Tags] | 3_NODE_SINGLE_LINK_TOPO | 3_NODE_DOUBLE_LINK_TOPO
| | Given Configure path in 3-node circular topology | ${nodes['TG']} | ${nodes['DUT1']}
| | ... | ${nodes['DUT2']} | ${nodes['TG']}
| | And Set interfaces in 3-node circular topology up
| | And Configure IP addresses on interfaces
| | ... | ${dut1_node} | ${dut1_to_dut2} | ${dut1_ip_address} | ${prefix}
| | ... | ${dut1_node} | ${dut1_to_tg}   | ${net1_gw_address} | ${prefix}
| | ... | ${dut2_node} | ${dut2_to_dut1} | ${dut2_ip_address} | ${prefix}
| | ... | ${dut2_node} | ${dut2_to_tg}   | ${net2_gw_address} | ${prefix}
| | And VPP IP Probe | ${dut1_node} | ${dut1_to_dut2} | ${dut2_ip_address}
| | And VPP IP Probe | ${dut2_node} | ${dut2_to_dut1} | ${dut1_ip_address}
| | And Add Arp On Dut | ${dut2_node} | ${dut2_to_tg} | ${net2_host_address}
| | ... | ${tg_to_dut2_mac}
| | ${dut1_gre_interface} | ${dut1_gre_index}=
| | ... | When Create GRE tunnel interface and set it up
| | ... | ${dut1_node} | ${dut1_ip_address} | ${dut2_ip_address}
| | ${dut2_gre_interface} | ${dut2_gre_index}=
| | ... | And  Create GRE tunnel interface and set it up
| | ... | ${dut2_node} | ${dut2_ip_address} | ${dut1_ip_address}
| | And Configure IP addresses on interfaces
| | ... | ${dut1_node} | ${dut1_gre_index} | ${dut1_gre_ip} | ${prefix}
| | ... | ${dut2_node} | ${dut2_gre_index} | ${dut2_gre_ip} | ${prefix}
| | And Vpp Route Add | ${dut1_node} | ${net2_address} | ${prefix}
| | ... | ${dut2_gre_ip} | ${dut1_gre_index}
| | Then Send packet and verify headers | ${tg_node}
| | ... | ${net1_host_address} | ${net2_host_address}
| | ... | ${tg_to_dut1} | ${tg_to_dut1_mac} | ${dut1_to_tg_mac}
| | ... | ${tg_to_dut2} | ${dut2_to_tg_mac} | ${tg_to_dut2_mac}

| TC02: DUT encapsulates IPv4 into GREoIPv4 tunnel - GRE header verification
| | [Documentation]
| | ... | [Top] TG=DUT1. [Enc] Eth-IPv4-ICMPv4 on TG_if1-DUT, \
| | ... | Eth-IPv4-GRE-IPv4-ICMPv4 on TG_if2_DUT. [Cfg] On DUT1 configure
| | ... | GREoIPv4 tunnel with IPv4 route towards TG. [Ver] Make TG send
| | ... | non-encapsulated ICMPv4 Echo Req to DUT; verify TG received
| | ... | GREoIPv4 encapsulated packet is correct. [Ref] RFC2784.
| | [Tags] | 3_NODE_DOUBLE_LINK_TOPO
| | Given Configure path in 2-node circular topology
| | ... | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['TG']}
| | And Set interfaces in 2-node circular topology up
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut_to_tg_if2} | ${dut1_ip_address} | ${prefix}
| | ... | ${dut_node} | ${dut_to_tg_if1} | ${net1_gw_address} | ${prefix}
| | And Add Arp On Dut | ${dut_node} | ${dut_to_tg_if2} | ${dut2_ip_address}
| | ... | ${tg_to_dut_if2_mac}
| | ${dut1_gre_interface} | ${dut1_gre_index}=
| | ... | When Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_ip_address} | ${dut2_ip_address}
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut1_gre_index} | ${dut1_gre_ip} | ${prefix}
| | And Vpp Route Add | ${dut_node} | ${net2_address} | ${prefix}
| | ... | ${dut2_gre_ip} | ${dut1_gre_index}
| | Then Send ICMPv4 and check received GRE header
| | ... | ${tg_node} | ${tg_to_dut_if1} | ${tg_to_dut_if2}
| | ... | ${dut_to_tg_if1_mac} | ${tg_to_dut_if2_mac}
| | ... | ${net1_host_address} | ${net2_host_address}
| | ... | ${dut1_ip_address} | ${dut2_ip_address}

| TC03: DUT decapsulates IPv4 from GREoIPv4 tunnel - IPv4 header verification
| | [Documentation]
| | ... | [Top] TG=DUT1. [Enc] Eth-IPv4-ICMPv4 on TG_if1-DUT, \
| | ... | Eth-IPv4-GRE-IPv4-ICMPv4 on TG_if2_DUT. [Cfg] On DUT1 configure
| | ... | GREoIPv4 tunnel towards TG. [Ver] Make TG send ICMPv4 Echo Req
| | ... | encapsulated into GREoIPv4 towards VPP; verify TG received IPv4
| | ... | de-encapsulated packet is correct. [Ref] RFC2784.
| | [Tags] | 3_NODE_DOUBLE_LINK_TOPO
| | Given Configure path in 2-node circular topology
| | ... | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['TG']}
| | And Set interfaces in 2-node circular topology up
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut_to_tg_if2} | ${dut1_ip_address} | ${prefix}
| | ... | ${dut_node} | ${dut_to_tg_if1} | ${net1_gw_address} | ${prefix}
| | And Add Arp On Dut | ${dut_node} | ${dut_to_tg_if1} | ${net1_host_address}
| | ... | ${tg_to_dut_if1_mac}
| | ${dut1_gre_interface} | ${dut1_gre_index}=
| | ... | When Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_ip_address} | ${dut2_ip_address}
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut1_gre_index} | ${dut1_gre_ip} | ${prefix}
| | Then Send GRE and check received ICMPv4 header
| | ... | ${tg_node} | ${tg_to_dut_if2} | ${tg_to_dut_if1}
| | ... | ${dut_to_tg_if2_mac} | ${tg_to_dut_if1_mac}
| | ... | ${net2_host_address} | ${net1_host_address}
| | ... | ${dut2_ip_address} | ${dut1_ip_address}

| TC04: DUT encapsulates IPv4 into GREoIPv4 different tunnels - GRE header verification
| | [Documentation]
| | ... | [Top] TG=DUT1. [Enc] Eth-IPv4-ICMPv4 on TG_if1-DUT, \
| | ... | Eth-IPv4-GRE-IPv4-ICMPv4 on TG_if2_DUT. [Cfg] On DUT1 configure two
| | ... | GRE tunnels with loopback's source address. Destination address of
| | ... | tunnels are routed via next hop address of DUT's to TG if2, where
| | ... | should be only GRE encapsulated packets. Each tunnel has IPv4 address
| | ... | and configured prefix routed through the tunnel. [Ver] Make TG send
| | ... | non-encapsulated ICMPv4 Echo Req to DUT; verify TG received GREoIPv4
| | ... | encapsulated packet is correct for each tunnel. [Ref] RFC2784.
| | [Tags] | 3_NODE_DOUBLE_LINK_TOPO
| | Given Configure path in 2-node circular topology
| | ... | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['TG']}
| | And Set interfaces in 2-node circular topology up
| | ${dut1_lo_index}= | And VPP Create loopback | ${dut_node}
| | And Set Interface State |  ${dut_node} | ${dut1_lo_index} | up
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut_to_tg_if2} | ${dut1_ip_address} | ${prefix}
| | ... | ${dut_node} | ${dut_to_tg_if1} | ${net1_gw_address} | ${prefix}
| | ... | ${dut_node} | ${dut1_lo_index} | ${dut1_lo_address} | ${32}
| | And Add Arp On Dut | ${dut_node} | ${dut_to_tg_if2} | ${dut2_ip_address}
| | ... | ${tg_to_dut_if2_mac}
| | And Vpp Route Add | ${dut_node} | ${tun0_dst} | ${32}
| | ... | ${dut2_ip_address} | ${dut_to_tg_if2}
| | And Vpp Route Add | ${dut_node} | ${tun1_dst} | ${32}
| | ... | ${dut2_ip_address} | ${dut_to_tg_if2}
| | ${dut1_gre0_interface} | ${dut1_gre0_index}=
| | ... | When Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_lo_address} | ${tun0_dst}
| | ${dut1_gre1_interface} | ${dut1_gre1_index}=
| | ... | And Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_lo_address} | ${tun1_dst}
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut1_gre0_index} | ${dut_tun0_ip1} | ${prefix}
| | ... | ${dut_node} | ${dut1_gre1_index} | ${dut_tun1_ip1} | ${prefix}
| | And Vpp Route Add | ${dut_node} | ${net2_address} | ${prefix}
| |  ... | ${dut_tun0_ip2} | ${dut1_gre0_index}
| | And Vpp Route Add | ${dut_node} | ${net3_address} | ${prefix}
| | ... | ${dut_tun1_ip2} | ${dut1_gre1_index}
| | Then Send ICMPv4 and check received GRE header
| | ... | ${tg_node} | ${tg_to_dut_if1} | ${tg_to_dut_if2}
| | ... | ${dut_to_tg_if1_mac} | ${tg_to_dut_if2_mac}
| | ... | ${net1_host_address} | ${net2_host_address}
| | ... | ${dut1_lo_address} | ${tun0_dst}
| | And Send ICMPv4 and check received GRE header
| | ... | ${tg_node} | ${tg_to_dut_if1} | ${tg_to_dut_if2}
| | ... | ${dut_to_tg_if1_mac} | ${tg_to_dut_if2_mac}
| | ... | ${net1_host_address} | ${net3_host_address}
| | ... | ${dut1_lo_address} | ${tun1_dst}

| TC05: DUT re-encapsulates IPv4 GRE into other GRE tunnel - GRE header verification
| | [Documentation]
| | ... | [Top] TG=DUT1. [Enc] Eth-IPv4-ICMPv4 on TG_if1-DUT, \
| | ... | Eth-IPv4-GRE-IPv4-ICMPv4 on TG_if2_DUT. [Cfg] On DUT1 configure two
| | ... | GRE tunnels with loopback's source address. Destination address of
| | ... | tunnels are routed via next hop address of DUT's to TG if2, where
| | ... | should be only GRE encapsulated packets. Each tunnel has IPv4 address
| | ... | and configured prefix routed through the tunnel. [Ver] Make TG send
| | ... | encapsulated IPv4 UDP to DUT; Encapsulated IP source is behind
| | ... | configured tunnel same as destination; verify TG received GREoIPv4
| | ... | encapsulated packet is correct. [Ref] RFC2784.
| | [Tags] | 3_NODE_DOUBLE_LINK_TOPO
| | Given Configure path in 2-node circular topology
| | ... | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['TG']}
| | And Set interfaces in 2-node circular topology up
| | ${dut1_lo_index}= | And VPP Create loopback | ${dut_node}
| | And Set Interface State |  ${dut_node} | ${dut1_lo_index} | up
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut_to_tg_if2} | ${dut1_ip_address} | ${prefix}
| | ... | ${dut_node} | ${dut_to_tg_if1} | ${net1_gw_address} | ${prefix}
| | ... | ${dut_node} | ${dut1_lo_index} | ${dut1_lo_address} | ${32}
| | And Add Arp On Dut | ${dut_node} | ${dut_to_tg_if2} | ${dut2_ip_address}
| | ... | ${tg_to_dut_if2_mac}
| | And Vpp Route Add | ${dut_node} | ${tun0_dst} | ${32}
| | ... | ${dut2_ip_address} | ${dut_to_tg_if2}
| | And Vpp Route Add | ${dut_node} | ${tun1_dst} | ${32}
| | ... | ${dut2_ip_address} | ${dut_to_tg_if2}
| | ${dut1_gre0_interface} | ${dut1_gre0_index}=
| | ... | When Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_lo_address} | ${tun0_dst}
| | ${dut1_gre1_interface} | ${dut1_gre1_index}=
| | ... | And Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_lo_address} | ${tun1_dst}
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut1_gre0_index} | ${dut_tun0_ip1} | ${prefix}
| | ... | ${dut_node} | ${dut1_gre1_index} | ${dut_tun1_ip1} | ${prefix}
| | And Vpp Route Add | ${dut_node} | ${net2_address} | ${prefix}
| |  ... | ${dut_tun0_ip2} | ${dut1_gre0_index}
| | And Vpp Route Add | ${dut_node} | ${net3_address} | ${prefix}
| | ... | ${dut_tun1_ip2} | ${dut1_gre1_index}
| | Then Send GRE and check received GRE header
| | ... | ${tg_node} | ${tg_to_dut_if2} | ${tg_to_dut_if2}
| | ... | ${dut_to_tg_if2_mac} | ${tg_to_dut_if2_mac}
| | ... | ${dut1_lo_address} | ${tun0_dst}
| | ... | ${net3_host_address} | ${net2_host_address}
| | ... | ${tg_to_dut_if2_mac} | ${dut_to_tg_if2_mac}
| | ... | ${tun1_dst} | ${dut1_lo_address}

| TC06: DUT do not process GRE with wrong tunnel destination IP
| | [Documentation]
| | ... | [Top] TG=DUT1. [Enc] Eth-IPv4-ICMPv4 on TG_if1-DUT, \
| | ... | Eth-IPv4-GRE-IPv4-ICMPv4 on TG_if2_DUT. [Cfg] On DUT1 configure two
| | ... | GRE tunnels with loopback's source address. Destination address of
| | ... | tunnels are routed via next hop address of DUT's to TG if2, where
| | ... | should be only GRE encapsulated packets. On DUT's to TG if1 interface
| | ... | is configured test destination host MAC address. [Ver] Make TG send
| | ... | GRE encapsulated ICMPv4 Echo Req to DUT; verify TG received
| | ... | de-capsulated packet is correct, then send packet with wrong tunnel
| | ... | destination address. [Ref] RFC2784.
| | ... |
| | [Tags] | 3_NODE_DOUBLE_LINK_TOPO
| | Given Configure path in 2-node circular topology
| | ... | ${nodes['TG']} | ${nodes['DUT1']} | ${nodes['TG']}
| | And Set interfaces in 2-node circular topology up
| | ${dut1_lo_index}= | And VPP Create loopback | ${dut_node}
| | And Set Interface State |  ${dut_node} | ${dut1_lo_index} | up
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut_to_tg_if2} | ${dut1_ip_address} | ${prefix}
| | ... | ${dut_node} | ${dut_to_tg_if1} | ${net1_gw_address} | ${prefix}
| | ... | ${dut_node} | ${dut1_lo_index} | ${dut1_lo_address} | ${32}
| | And Add Arp On Dut | ${dut_node} | ${dut_to_tg_if1} | ${net1_host_address}
| | ... | ${tg_to_dut_if1_mac}
| | And Add Arp On Dut | ${dut_node} | ${dut_to_tg_if2} | ${dut2_ip_address}
| | ... | ${tg_to_dut_if2_mac}
| | And Vpp Route Add | ${dut_node} | ${tun0_dst} | ${32}
| | ... | ${dut2_ip_address} | ${dut_to_tg_if2}
| | And Vpp Route Add | ${dut_node} | ${tun1_dst} | ${32}
| | ... | ${dut2_ip_address} | ${dut_to_tg_if2}
| | ${dut1_gre0_interface} | ${dut1_gre0_index}=
| | ... | When Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_lo_address} | ${tun0_dst}
| | ${dut1_gre1_interface} | ${dut1_gre1_index}=
| | ... | And Create GRE tunnel interface and set it up
| | ... | ${dut_node} | ${dut1_lo_address} | ${tun1_dst}
| | And Configure IP addresses on interfaces
| | ... | ${dut_node} | ${dut1_gre0_index} | ${dut_tun0_ip1} | ${prefix}
| | ... | ${dut_node} | ${dut1_gre1_index} | ${dut_tun1_ip1} | ${prefix}
| | Then Send GRE and check received ICMPv4 header
| | ... | ${tg_node} | ${tg_to_dut_if2} | ${tg_to_dut_if1}
| | ... | ${dut_to_tg_if2_mac} | ${tg_to_dut_if1_mac}
| | ... | ${net2_host_address} | ${net1_host_address}
| | ... | ${tun0_dst} | ${dut1_lo_address}
| | And Run Keyword And Expect Error | ICMP echo Rx timeout
| | ... | Send GRE and check received ICMPv4 header |
| | ... | ${tg_node} | ${tg_to_dut_if2} | ${tg_to_dut_if1}
| | ... | ${dut_to_tg_if2_mac} | ${tg_to_dut_if1_mac}
| | ... | ${net2_host_address} | ${net1_host_address}
| | ... | ${tun0_dst} | ${dut1_ip_address}